3231665136 has 240 divisors, whose sum is σ = 10610828800. Its totient is φ = 899154432.

The previous prime is 3231665119. The next prime is 3231665149. The reversal of 3231665136 is 6315661323.

3231665136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 3231665136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7361205 + ... + 7361643.

Almost surely, 2^3231665136 is an apocalyptic number.

3231665136 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3231665136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5305414400).

3231665136 is an abundant number, since it is smaller than the sum of its proper divisors (7379163664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3231665136 is a wasteful number, since it uses less digits than its factorization.

3231665136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636 (or 627 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 3231665136 is about 56847.7364193158. The cubic root of 3231665136 is about 1478.4572943656.

The spelling of 3231665136 in words is "three billion, two hundred thirty-one million, six hundred sixty-five thousand, one hundred thirty-six".